Clamp.



A. ERMAN.

0mm, APPLIUATION FILED JAN-10, 1914,.

f Patemd Apr. M, 19M

AUGUST EEMANIF OMAHA, NEBRASKA.

CLAIR.

Specification of Lettere IIPatent.

` .Patenten npr. il, wie. 'l

Application filed January 10, 19M. Serial No. 811,454.

This invention relates to clanips and more particularly to that type ofdeviceafor selo cbuing or holding articles upon machine e s. i

The object of the invention is to ,provide a simple indV efficientdevice of thie chaff acter which may be readilyv attached to the bedplate of the drill press planer or other similar machines so that thematerial being operated upon may be conveniently held in position.

Further objects ol the invention will appear es the followingdescription is read in connection with the accompanying. drawing, whichforms n part of this application, end in which Fi ure 1 is n sideelevation of the device 225 attac ied to the fragment of a bed plate ofa machine Ashowing a piece of work intrposed between the bed' plate andthe jaw of theclemp. Fig. 2 is a vertical sectional view taken on theline 2-2 of Fig. 1. Fig. fio 3 is a vertical sectional view taken on theline 3--3 of Fig. 1. Fig. 4 is a horizontal section ori-the linegl-4 ofFig. 1.

Referring more particularly to the ,draw-1 ing, 1 represents the bedplate of the4 ma- 35 chine which is provided with'the usuel dovetailgroove 2. Arranged to be slidably mounted in the groove is the heed 3 ofan adjusting bolt 4 which is. threaded to receive a retaining nut 5.@lis bolt passes e0 through elongitudinel slot 6 formed lin the inw 7which is arranged, as willbe heref inafter described, to co-ect with thebed plete, the hed plate acting as one jaw, to clamp the material inposition to be 'worked eli on'. (lne end of the jwhaefeecured thereto apair of arms8 between which is pivotellyJr mounted a nut 9 through whichthe clamp-,2; ing screw 10 passes. his clamping screw 7 is squared upon.its upper end to receive ad* operating handle 11 and is swiveled at ite5v lower end into a. nut or head 12 which is also arranged to slide inthe groove 2 of,`

the .bed pletemflhe screw llrotateeffreely 1n the nut 12 and the mit 9is freely pivotedy between the erms 8 so `es to permitl any 5f@ angularosition of the jaw 7. llt will be noticed t at both ofthe nnte 3 and 12are' polygonal soas to be engaged by the walls of the groove to preventturning withthe bolts. v so What is claimed is:- 1. In a clamp, va jawmember having e longitudinal slot, a'nut swiveled in one end of the jawmember, an adjusting Screw pass ing therethrough, a bolt yhaving a note5 threaded thereon, said last-named bolt he ing adjustable'in the slottoward 'ond away from the screw and means for connecting the" screw andbolt to the bed plete of the ma chine. 7U 2. ln combination, a. bedplete having aY dove-tail groove therein, e. screw having an lintegralpolygonal head slidahly mounted in the groove, -an adjusting nutthreaded onto the bolt, a jew provided with e 1ongi- 'l5 tudinnl 'slotto receive said bolt, e. nut

,swiveled in the jaw at one end thereof,y a

Screw having. a polygonal nut swiveled upon f one' end thereof andarrangedftoslide Within the groove, said `screw bein threaded in the 8onutand having relative a jnstment toward: and awav from thebolt andmeans for op erating the screw'. 1 ,"'L-v,...

In testimony' whereof I affix my signo-f ture in preeenoe of twowitnesses. AUGUST ERMAN.

Witnesses: y 1' l GEORGE A. KELLBY,

- Kronor-Ae Knwse

